c++ filesystem read directory
To read a directory using the C++ filesystem library, you can follow these steps:
Include the necessary headers: Begin by including the required headers for working with the filesystem library in C++. This can be done by including the
<filesystem>
header.Create a
path
object: Next, create apath
object using the directory path you want to read. Thepath
class represents a file system path and provides various methods to manipulate and access file system paths.Check if the directory exists: Use the
exists()
function from thestd::filesystem
namespace to check if the directory exists. This function returnstrue
if the directory exists, andfalse
otherwise.Read the directory: If the directory exists, use a
directory_iterator
object to iterate over the contents of the directory. Thedirectory_iterator
class provides a way to iterate over the directory entries.Process the directory entries: Loop through the directory entries using a
for
loop and perform any desired operations on each entry. You can access the name of each entry using thepath()
function of thedirectory_entry
class.
Here's an example code snippet that demonstrates these steps:
#include <filesystem>
#include <iostream>
int main() {
std::filesystem::path directoryPath("path/to/directory");
if (std::filesystem::exists(directoryPath)) {
for (const auto& entry : std::filesystem::directory_iterator(directoryPath)) {
std::cout << entry.path().filename() << std::endl;
}
}
return 0;
}
In this example, replace "path/to/directory"
with the actual path of the directory you want to read. The code checks if the directory exists and then prints the name of each entry (file or subdirectory) in the directory.
Remember to compile the code with a C++17 compliant compiler and link against the appropriate libraries.